Adds PHP 7.2 to Travis (#186)

Author: bshaffer

.travis.yml

@@ -1,12 +1,17 @@
 language: php
 
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6
   - 7.0
   - 7.1
+  - 7.2
+
+matrix:
+  include:
+    - php: 5.3
+      dist: precise
 
 sudo: false